Method of manufacturing the knives of rzors



July 12, 1927.

E. GERLING METHOD OF MANUFACTURING THE KNIVES 0F RAZORS Filed July so,192ev Wnar saving and material saving manufacturing Iinl Patented .luly12, y192?.

UNITED STATES ERNST GEBLING, l' DELIGE-SOLINGEN, GEBHN'Y.

-xnrnonor mul-screams man xmms or Bezons.

I V Application med July-80, 1926, Serial No. 126,025, and in Germany'September l5, 1925.

The-invention refers to the art-of manufacturing razors, and its objectis, to render the manufacture of razor knives more economic by theintroduction 'of modern labour methods, allowing at the "same time, toturn out manufacturedA goods of most superior quality at a reducedprice.

The metallic part or knife of razors, which consists of the blade and ofthe stem, and which is fastened in the sheath orI handle, ismanufactured up to the resent time as a rule by manual labour. n theother side it has been proposed already, to replace the manual labour bymechanical work, through the application of a manufacturing method, inwhich the whole razor knife isl cut out of a continuous steel ribbon,which is shaped by passing it through correspondformed rollers. d e newand improved method of manufacturing the knives of razors, which is thesubject of my present invention, consists in manufacturing separatelythe blades proper i out of a continuous steel ribbon and inmanufacturing the stems of the blades out of another steel or metallicribbon and in uniting thereupon the blades with the stems in anysuitable manner, for instance by a. welding or riveting process. If theblades and the stems would be 4cut `out alternatingly out of the samesteel ribbon, then this ribbon would have to be rolled correspondinglyin sections, soas to produce lengths, which are shaped to the form ofthe blade or to the form of thestem alternatingly. But suchmanufacturing method involves considerable l of material, as the stemsare much smaller than the blades. My new and improved manufacturingmethod avoids those considerablelosses.

Another eential point of my invention l i is the particular shape of thesteel ribbons to be used in thel manufacturing process.

i' The steel ribbon" for the bladesl may be wise. Such arran chosen ofsuch shape,'that the bladesjare arranged in it following each otherlengthent results in a steel ribbon of a coni or' triangular crosssection, the sides of which are preferably hollow curved, to bring theblades to the sha which is needed in the practica use of t e razor. In asimilar way for e stems a steel ribbon maybe chosen, in which the stemsare arran 'side by side crosswse to the length of e ribbon, and likewisethls ltowards the curv ribbon is Vfurther made of Sughuymnicalconformity with the conditions in the i111- ished razor knife.' In'carrying out my invention it is further an importantl feature, that theused two continuous steel ribbons are of such shape, that the blades andlikewise so the stems are always cut out in pairs, which requires, thetwo ribbons to have double conical cross sections. Finally a mostimportant feature of my invention consists therein, that it allows thestemsto .be manufactured out of a cheaper material, than the blades,which means another reduction of the costs of the manufactured goods.

In the drawin invention with re erence to its preferredembodimenthwhereby the 1 and'2 are the plan and the crosssectlon of theribbon, out of which the blades are cut;

Figs.- 3 and 4 are the plan and the crosssection of the ribbon, out ofwhich the stems are cut; and v Fig. 5 is theplan of a blade and of a Ihave illustrated my A stem, before they' are united,.to form-the v knifeof. a razor.

In the Figs. 1 and 2 the steel ribbon 'for forming the 'blades isrolled, so as to- `2. The Figures 3 and 4 show the ribbon 3 rming thestems 4, this ribbon being for fo likewise thickest in its medium partor longitudinal axis, and slanting to both sides,

so as to produce a cross-section of the ribbon, which is conical fromits middle 'axis towards both rims. This double sided conical crowsection of the steel ribbon has the result that each single 'shaft 4,after being uni with its blade proper 2, tapers in the direction fromthe -rt fastened to the blade edpgnd at the handle, without any forgingor other ial working on it being necessary to this effect. In a lessAperfect embodiment of the' manufacturing proee steelribbons may beused, which i have notdouble. conical cross ysection,'but

e d l n sim le one sided comcal cross sectlon, such as 1t would beobtained, if the ribbons, shown in the Figs. 1 and 2, reetively 1n theFigs. 3 and 4,-were cut in e1r middle longitudinal axis and only theright half or the left half of them would be used.

The blades and the stems are ut together, as the Figure 5 shows it, andtiey are then united by welding or riveting or by any other suitableprocess. of the metallic ribbons 1 and 3 can be chosen so that nearly noloss at all of the valuable material takes place; and furtherconsiderable economies in the manufacture can be made by using the mostexpensive quality brand steel only for the ribbon l, from which theblades are made, whilst the ribbon 3 for the stems may be made out ofless valuable material.

l claim: v l. A method of manufacturing razor ives, consisting in:manufacturing the blades proper separately out of a continuous steelribbon of conical or triangular cross section with double concave sides,in whichv the blades are arranged lengthwise the one after the other;and manufacturing the metallic stems of the blades out of anothercontinuous lmetallic ribbon; and uniting the stems with the blades.

2. A method of manufacturing razor knives, consisting in: manufacturingthe blades proper separately out of a continuous steel ribbon; andmanufacturing the metallic stems of the blades out of another continuousmetallic ribbon of conical cross section, in which the stems arearranged side by side crosswise to the length of the ribbon; and

i uniting the stems with the blades.

3. A method of manufacturing razor knives, consisting in: manufacturingthe blades pro er separately out of a continuous steel ri bon of doubleconical cross sec- The cross sectionsv Lemert.

lowing lengthwise the one pair after the other pair in the ribbon; andmanufacturing the metallic stems of the blades separately out of anothermetallic or steel ribbon of likewise double conical cross section, whichslants from the middle longitudinal axis to both rims of the ribbon,whereby pairs of stems with a head-tohead arrangement of the singleconical stems follow in a sidebyside arrangement along the length of theribbon; and uniting the stems with the blades. 'V

la A method of manufacturing razor knives, consisting in: manufacturingthe blades proper separately out of a continuous, higher quality steelribbon of double conical cross-section with concave planes extendingfrom the middle longitudinal axis towards both rims of the ribbon, andwith pairs of blades, following one pair after the other pair lengthwisein the ribbon; and manufacturing the metallic stems of the bladesseparately out of another continuous, less valuable metallic ribbon oflikewise double conical cross section, which slants from the middlelongitudinal axis towards both rims of the ribbon, whereby pairs ofstems with a headeto-head arrangement of the single conical stems followeach other in a side-byside arrangement along the length of the ribbon;and uniting the stems with the blades.

signature.

ERNST GERLING.

